309469976448 has 128 divisors (see below), whose sum is σ = 840398008320. Its totient is φ = 100856211456.

The previous prime is 309469976423. The next prime is 309469976461. The reversal of 309469976448 is 844679964903.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18274161 + ... + 18291087.

It is an arithmetic number, because the mean of its divisors is an integer number (6565609440).

Almost surely, 2^309469976448 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 309469976448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (420199004160).

309469976448 is an abundant number, since it is smaller than the sum of its proper divisors (530928031872).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

309469976448 is a wasteful number, since it uses less digits than its factorization.

309469976448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18004 (or 17992 counting only the distinct ones).

The product of its (nonzero) digits is 282175488, while the sum is 69.

The spelling of 309469976448 in words is "three hundred nine billion, four hundred sixty-nine million, nine hundred seventy-six thousand, four hundred forty-eight".